Matter in intergalactic space is distributed in a vast network of interconnected filamentary structures, collectively referred to as the cosmic web. With hundreds of hours of observations, an ...

You could swim through the deepest voids and encounter a single hydrogen atom in an entire football field's worth of space. At the very largest scales, galaxies are not scattered around randomly.

"For the first time, we could trace the boundary between the gas residing in galaxies and the material contained within the cosmic web through direct measurements." When you purchase through links on ...

We are zeroing in on the true composition of the rarest, highest-energy cosmic rays – which could help reveal their unknown origins. Previous ultra-high-energy cosmic ray detections – by the Pierre ...